Bright outdoor light at night may increase stroke risk

kAm%96 k2 9C67lQ9EEADi^^HHH]292;@FC?2=D]@C8^5@:^`_]``e`^$%#~ztpwp]`ab]_cch_cQ E2C86ElQ0D6=7QmDEF5Jk^2m :?G@=G65 >@C6 E92? ag[___ A6@A=6 =:G:?8 :? 2 =2C86 4:EJ :? r9:?2] #6D62C496CD 7@F?5 E92E A6@A=6 6IA@D65 E@ E96 9:896DE =6G6=D @7 2CE:7:4:2= @FE5@@C =:89E 2E ?:89E 925 2 cbT :?4C62D65 C:D< @7 56G6=@A:?8 46C63C@G2D4F=2C 5:D62D6[ 2D 4@>A2C65 E@ E9@D6 H:E9 E96 =@H6DE =6G6=D @7 6IA@DFC6] r6C63C@G2D4F=2C 5:D62D6 :?4=F56D DEC@<6 2?5 @E96C 4@?5:E:@?D 27764E:?8 3=@@5 7=@H E@ E96 3C2:?]k^Am

kAm!C6G:@FD DEF5:6D 92G6 =:?<65 :?4C62D65 6IA@DFC6 E@ 3C:89E[ 2CE:7:4:2= =:89E E@ E96 56G6=@A>6?E @7 42C5:@G2D4F=2C 5:D62D6[ H9:49 2C6 4@?5:E:@?D C6=2E65 E@ 3=@@5 7=@H :? 2CE6C:6D] #6D62C496CD D2:5 E96:C DEF5J :D @?6 @7 E96 7:CDE E@ 6IA=@C6 E96 C6=2E:@?D9:A 36EH66? =:89E 2E ?:89E 2?5 3C2:? 962=E9]k^Am

kAmQ~FC DEF5J DF886DED E92E 9:896C =6G6=D @7 6IA@DFC6 E@ @FE5@@C 2CE:7:4:2= =:89E 2E ?:89E >2J 36 2 C:D< 724E@C 7@C 46C63C@G2D4F=2C 5:D62D6[Q DEF5J 4@\2FE9@C sC] y:2?3:?8 (2?8 D2:5 :? 2 k2 9C67lQ9EEADi^^?6HDC@@>]962CE]@C8^?6HD^>@C6\6IA@DFC6\E@\2CE:7:4:2=\3C:89E\@FE5@@C\?:89EE:>6\=:89E\=:?<65\E@\9:896C\DEC@<6\C:D<Q E2C86ElQ0D6=7Qm?6HD C6=62D6k^2m] (2?8 :D 2 C6D62C496C :? E96 56A2CE>6?ED @7 AF3=:4 962=E9 2?5 6?5@4C:?@=@8J @7 E96 r9:=5C6?VD w@DA:E2=[ +96;:2?8 &?:G6CD:EJ $49@@= @7 |65:4:?6 2?5 E96 }2E:@?2= r=:?:42= #6D62C49 r6?E6C 7@C r9:=5C6?VD w62=E9 :? w2?8K9@F[ r9:?2] !6@A=6[ 6DA64:2==J E9@D6 =:G:?8 :? FC32? 2C62D[ D9@F=5 4@?D:56C C65F4:?8 E92E 6IA@DFC6 E@ AC@E64E E96>D6=G6D[ 96 D2:5]k^Am

kAm%96 DEF5J H2D AF3=:D965 |@?52J :? E96 p>6C:42? w62CE pDD@4:2E:@? ;@FC?2= $EC@<6]k^Am

kAmp3@FE g_T @7 E96 H@C=5VD A@AF=2E:@? =:G6D :? =:89E\A@==FE65 6?G:C@?>6?ED[ E96 DEF5JVD 2FE9@CD D2:5] r@?E:?F@FD 6IA@DFC6 E@ 2CE:7:4:2= =:89E 2E ?:89E 42? DFAAC6DD AC@5F4E:@? @7 >6=2E@?:?[ 2 9@C>@?6 E92E AC@>@E6D D=66A] !6@A=6 H:E9 A@@C D=66A[ 4@>A2C65 E@ 8@@5 D=66A6CD[ 2C6 >@C6 =:<6=J E@ 6IA6C:6?46 H@CD6 42C5:@G2D4F=2C 962=E9 @G6C E:>6[ E96 C6D62C496CD D2:5]k^Am

kAm%96 DEF5J :?G@=G65 ag[b_a 25F=ED =:G:?8 :? }:?83@[ 2? :?5FDEC:2= A@CE 4:EJ @7 >@C6 E92? g]a >:==:@? A6@A=6 @? r9:?2VD 62DE 4@2DE] p=>@DE e_T @7 E96 A2CE:4:A2?ED H6C6 H@>6?[ 2?5 E96 2G6C286 286 H2D ea] p>@?8 E9@D6 6I4=F565 7C@> E96 DEF5J H6C6 A6@A=6 H:E9 6IEC6>6 =6G6=D @7 6IA@DFC6 E@ @FE5@@C =:89E 2E ?:89E[ A6@A=6 AC6G:@FD=J 5:28?@D65 H:E9 46C63C@G2D4F=2C 5:D62D6 2?5 E9@D6 H9@ 56G6=@A65 :E H:E9:? 2 J62C 27E6C 6?C@==:?8]k^Am

kAm%96 2?2=JD:D 2?5 7@==@H\FAD H6C6 4@?5F4E65 7C@> a_`d E@ a_a`] tIA@DFC6 E@ C6D:56?E:2= @FE5@@C ?:89EE:>6 =:89E H2D 2DD6DD65 3J D2E6==:E6 :>286D E92E >2AA65 =:89E A@==FE:@?] r2D6D @7 DEC@<6 H6C6 4@?7:C>65 3J 9@DA:E2= >65:42= C64@C5D 2?5 562E9 46CE:7:42E6D]k^Am

kAmp>@?8 E96 DEF5J A2CE:4:A2?ED[ `[afg A6@A=6 56G6=@A65 46C63C@G2D4F=2C 5:D62D6[ :?4=F5:?8 fff 42D6D @7 :D496>:4 DEC@<6[ E96 >@DE 4@>>@? EJA6 @7 DEC@<6[ H96C6 2 4=@E 3=@4<D 3=@@5 7=@H E@ E96 3C2:?]k^Am

kAm%96 DEF5J 2=D@ =@@<65 2E =6G6=D @7 2:C A@==FE:@? 2?5 7@F?5 :ED A@DD:3=6 67764ED E@ 36 :?56A6?56?E 7C@> =:89E 6IA@DFC6]k^Am

kAm!6@A=6 6IA@D65 E@ E96 9:896DE =6G6=D @7 E96 EJA6 @7 2:C A@==FE:@? 2DD@4:2E65 H:E9 E96 4@>3FDE:@? @7 82D@=:?6[ @:=[ 5:6D6= 7F6= @C H@@5 925 2 c`T :?4C62D65 C:D< @7 56G6=@A:?8 46C63C@G2D4F=2C 5:D62D6 4@>A2C65 E@ A2CE:4:A2?ED H:E9 E96 =@H6DE =6G6=D @7 6IA@DFC6]k^Am

kAm!6@A=6 6IA@D65 E@ E96 9:896DE =6G6=D @7 2:C A@==FE:@? 42FD65 3J 5FDE @C D>@<6 925 2 d_T :?4C62D65 C:D< @7 46C63C@G2D4F=2C 5:D62D6 4@>A2C65 E@ E9@D6 6IA@D65 E@ E96 =@H6DE =6G6=D]k^Am

kAmp?5 E9@D6 6IA@D65 E@ E96 9:896DE =6G6=D @7 ?:EC@86? @I:56 7C@> >@E@C G69:4=6 2?5 A@H6C A=2?E 6>:DD:@?D[ 925 2 b`T 9:896C C:D< @7 46C63C@G2D4F=2C 5:D62D6 4@>A2C65 E@ E9@D6 H:E9 E96 =@H6DE 6IA@DFC6]k^Am

kAmQs6DA:E6 D:8?:7:42?E 25G2?46D :? C65F4:?8 EC25:E:@?2= 42C5:@G2D4F=2C C:D< 724E@CD DF49 2D D>@<:?8[ @36D:EJ 2?5 %JA6 a 5:236E6D[ :E :D :>A@CE2?E E@ 4@?D:56C 6?G:C@?>6?E2= 724E@CD :? @FC 677@CED E@ 564C62D6 E96 8=@32= 3FC56? @7 42C5:@G2D4F=2C 5:D62D6[Q (2?8 D2:5]k^Am

kAm%96 A@AF=2E:@? DEF5:65 H2D 7C@> @?6 4:EJ[ D@ E96 7:?5:?8D >2J ?@E 2AA=J E@ A6@A=6 :? @E96C 4@>>F?:E:6D[ E96 2FE9@CD D2:5] ~E96C =:>:E2E:@?D :?4=F56 2 =24< @7 52E2 @? :?5@@C =:89E:?8 AC@5F4ED @C D925:?8 >62DFC6D DF49 2D 3=24<@FE 4FCE2:?D] p=D@[ D2E6==:E6\32D65 AC@5F4ED C2C6=J 42AEFC6 3=F6 =:89E D@FC46D[ H9:49 >2J =625 E@ 2? F?56C6DE:>2E65 2DD@4:2E:@? 36EH66? @FE5@@C =:89E 2E ?:89E 2?5 46C63C@G2D4F=2C 5:D62D6]k^Am

kAmQ(6 ?665 E@ 56G6=@A >@C6 67764E:G6 A@=:4:6D 2?5 AC6G6?E:@? DEC2E68:6D E@ C65F46 E96 3FC56? @7 5:D62D6 7C@> 6?G:C@?>6?E2= 724E@CD DF49 2D =:89E 2D H6== 2D 2:C A@==FE:@?[ A2CE:4F=2C=J 7@C A6@A=6 =:G:?8 :? E96 >@DE 56?D6=J A@AF=2E65[ A@==FE65 2C62D 2C@F?5 E96 H@C=5[Q (2?8 D2:5]k^Am

k2 9C67lQ9EEADi^^HHH]962CE]@C8^6?^?6HDQ E2C86ElQ03=2?<Qmp>6C:42? w62CE pDD@4:2E:@? }6HDk^2m

kAm4@G6CD 962CE 2?5 3C2:? 962=E9] }@E 2== G:6HD 6IAC6DD65 :? E9:D DE@CJ C67=64E E96 @77:4:2= A@D:E:@? @7 E96 p>6C:42? w62CE pDD@4:2E:@?] r@AJC:89E :D @H?65 @C 96=5 3J E96 p>6C:42? w62CE pDD@4:2E:@?[ x?4][ 2?5 2== C:89ED 2C6 C6D6CG65]k^Am